What happens when ionic hydrides of $s$-block elements in molten state are electrolysed?

Among the following,the correctly matched pair is

Given below are two statements :
Statement-$I$: The process of producing syn-gas is called gasification of coal.
Statement-$II$: The composition of syn-gas is $CO + H_2$ ($1 : 1$ ratio).
In the light of the above statements,choose the most appropriate answer from the options given below:

What do you understand by the terms: $(i)$ hydrogen economy,$(ii)$ hydrogenation,$(iii)$ 'syngas',$(iv)$ water-gas shift reaction,and $(v)$ fuel-cell?

Which of the following metals absorbs hydrogen?

Hydrogen readily combines with non-metals and thus it shows its